【摘要】 按季节对杭州市大气细颗粒物PM2.5中16种多环芳烃(PAHs)的含量在2006年进行了为期一年(样本数n=47)的测定分析。研究表明,杭州市大气PM2.5中PAHs总浓度为40.66ng/m3,以中环或高环为主,分别占总PAHs的32.23%和47.6%;云栖点位(位于风景名胜区内)PM2.5中PAHs浓度高于朝晖点位(位于商业居民混合区);季节变化呈现春季高,秋季低的特点;PM2.5中苯并[a]芘等效毒性(BEQ)为4.50;PM2.5中PAHs的来源不是单一的。更多还原

【Abstract】 The ambient PM_2.5 of Hang Zhou were sampled in four seasons for one year（n=47）,and 16 types of PAHs were analyzed.Results showed that the mean concentration of PAHs in ambient PM_2.5 was 40.66 ng/m³,most of which were medium rings and high rings,accounting for 32.23%和47.6%,respectively.The PAHs concentration at yunxi monitoring site,representing scenic spot,was higher than that at zhaohui monitoring site,which represents residential and commercial mixed district.The concentration level of PAHs in spring was higher than that in autumn.The benzo（a）pyrene equivelent toxicity was 4.50, lower than the standard limits（10）.The source of PAHs in PM_2.5 was variety.更多还原